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chem chap12-13 study
| Question | Answer |
|---|---|
| How can you tell if a solution is unsaturated? | The solution, under normal conditions, can absorb more solute. |
| How can you tell if a solution is saturated? | The solution will not absorb any more solute. |
| How can you tell if a solution is supersaturated? | The solution rapidly forms crystals when disturbed by dust or similar. |
| How do you use a solubility curve? | Define the variable you know, convert it into one of the variables graphed on the curve, and run it to the curve of the solute you want. |
| How do you calculate molarity? | Take the moles of solute you have and divide it by liters of solution. |
| How do you calculate molality? | Take the moles of solute you have and divide it by the kilograms of solvent. |
| How do you calculate dilution changes? | Use the formula (1st molar mass)*(1st volume)=(2nd molar mass)*(2nd volume) |
| How do most ionic compounds dissolve in water? | The water surrounds an ion with its oppositely charged side facing the ion, and allows it to float away. |
| How do you write an ionic equation? | Take the two ionic compounds you have and split them up into ions. Write each individual ion out along with their charge. |
| How do you write a net ionic equation? | Same as an ordinary ionic equation, but remove ions that don't form precipitate. |
| What factors affect the rates of dissolving? | Three things: Surface area, agitation, and heating. |
| What affects solubility? | Nature of solute, temperature or state, and pressure. |
| How do aqueous solutions dissolve? | Molecular nonelectrolytes merely spread out, ionic compounds split into ions, and molecular electrolytes split into ions by reacting with water. |
| What are the colligative properties? | The pressure, or height, at which solutions boil or freeze, i.e. vapor pressure. |
| What is the formula to calculate the change in freezing and boiling points? | Change=molar mass*change in solvent*ions in solvent |
| What is the formula to calculate the freezing and boiling point at standard pressure? | Solution point=solvent point+change |
| What is osmotic pressure? | The balance between pure solvent attempting to balance out a solution and vapor pressure pushing it back with a semipermeable membrane balancing them. |
Created by:
lapplebey
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